Which of the following statements is true? A thin layer of chyme protects the lining of the digestive tract from being broken do
wn by enzymes. Hydrochloric acid (HCl) begins the partial digestion of fats in the small intestine. Cystic fibrosis is an infectious disease that causes the muscles that control swallowing to malfunction. Heartburn often results when the gastroesophageal sphincter fails to close properly.
The correct answer is: Heartburn often results when the gastroesophageal sphincter fails to close properly.
The gastroesophageal sphincter is a muscle located at the bottom of the esophagus that has to be relaxed in order to allow food to flow down into the stomach. After it contracts (tightens), the food and the stomach acid can’t flow back up into the esophagus.
When the gastroesophageal sphincter fails to close properly acid reflux occurs and causes the heartburn.
the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
Although prokaryotes divide through binary fission, eukaryotes undergo a more complex process of cell division because DNA is packed in several chromosomes located inside a Cell dividing by mitosis.
